Vacuum flask with flared base



FIG. 1 is a front elevational view of the vacuum flash with flared base showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is an exploded side elevational view thereof;

FIG. 5 is a top plan view thereof with the drinking cup attached;

FIG. 6 is a top plan view thereof with the drinking cup removed; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a vacuum flask with flared base, as shown and described. 